The procedure is to disconnect the auxiliary battery negative cable, remove the positive extension cable nut from the junction block and disconnect the cable, remove the air cleaner assembly, remove the air cleaner outlet duct, the positive extension cable nut from the intake air heater and disconnect the cable, disconnect the wiring harness clips, remove the battery positive cover from the underhood bused electrical center (UBEC), remove the positive extension cable nut from the UBEC terminal stud, and the positive extension cable.